The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 05, 2015
Filed:
Aug. 10, 2011
Applicants:
Takahiro Kawaguchi, Shiga, JP;
Shinkichi Miwa, Shiga, JP;
Inventors:
Takahiro Kawaguchi, Shiga, JP;
Shinkichi Miwa, Shiga, JP;
Assignee:
Nippon Electric Glass Co., Ltd., Shiga, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C03C 3/087 (2006.01); C03C 3/091 (2006.01); H01L 51/00 (2006.01); H01L 51/52 (2006.01);
U.S. Cl.
CPC ...
C03C 3/091 (2013.01); C03C 3/087 (2013.01); H01L 51/0096 (2013.01); H01L 51/52 (2013.01); H01L 2251/55 (2013.01); H01L 2251/556 (2013.01);
Abstract
Provided is an alkali-free glass, which is substantially free of alkali metal oxides, and has a strain point of more than 680° C., an average coefficient of thermal expansion in the temperature range of 30 to 380° C. of 40 to 55×10/° C., and a liquidus temperature of less than 1,200° C. Further, the alkali-free glass comprises, as a glass composition in terms of mass %, 55 to 70% of SiO, 10 to 20% of AlO, 0.1 to 4.5% of BO, 0 to 1% of MgO, 5 to 15% of CaO, 0.5 to 5% of SrO, and 5 to 15% of BaO.